Art of grinding



Nov. 1; 1927'. 1,641,130

L. R.,HEIM

ART 0: GRINDI'NG Filed May 26. 1922 Lu -4 6. AT

Patented Nov. 1 1927.

UNITED STATES PATENT OFFICE.-

T.EW]S R. HEIM, OF DANBURY, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGNMENTS.I TO CINCINNATI GRINDERS INCORPORATED, OF CINCINNATI, OHIO, A CORPORA-TION OF OHIO.

ART OF GRINDING.

Application filed May 26,

This invention relates to grinding .and more particularly to an art ofcenterless grinding. One of the objects thereof 1s to provide apractical art of the above nature which can be rapidly carried on andwhich will be dependable in its results. Another object is to provide anart of the above na ture in which the required apparatus is, simple anda high degree of accuracy ma1n tained. Another object is to provide anart 0 of the above nature especially adapted to handle rapidly andefliciently articles of short length relative to their diameter. Otherobjects will be in part obvious or in part pointed out hereinafter.

The invention accordingly consists in the several steps, combinations ofsteps and relation of one or more of the same to other steps, all aswill be illustratively herein described and the scope of the applicationof which will be indicated in the following claims.

In the accompanying drawing, in which is illustrated one of variouspossible methods of carrying on my invention,

Figure 1 is a plan view; and

Figure 2 is a side elevationwith one of the wheels removed. I

Similar reference characters refer to similar parts throughout bothviews of the drawing.

Considering first the structure of the apparatus, there is shown at 10 asupport on which the work rests while traveling through the machine.Positioned at one side of this support, as shown in Fig. 1 of thedrawings, is a grinding wheel 11 driven, as indicated by the arrow, at ahigh rate of speed in such direction that its operative face will movedownwardly or toward the support. On the opposite side of the support isa regulating wheel 12 which travels in the opposite direction, that is,its'active surface moves upwardly oraway from the support. Thisregulating wheel moves at a slow rate of speed, preferably at such arate that there will be no material slip between its surface and thework which it contacts. It may also be noted that the regulatin wheel isset at an angle. as indicated in the drawing. with respect to thesupporting surface of the work support so that there will be a componentof its action lengthwise of the support tending to feed the work in thedirection indicated by 1922. Serial No. 563,807.

the arrow in Fig. 2. The regulating wheel thus not only feeds the workbut causes it to rotate about its axis at the desired rate of speedwhile the grinding wheel, driven at the best peripheral speed forgrinding action, does its Work on the material which is rotated and fedpast it.

As herein shown, these Wheels are of the so-called peripheral type ascertain advantages are inherent in that type, but it may be noted thatmany features of this invent1on comprehend the use of apparatus n whichgrinding wheels of other form are employed.

At each side of the entering end of the work support are positionedguides 13 which tend to hold the work in proper position to enter intothe grip of the wheels. -In similar manner, at the discharge end of theWork support are positioned on opposite sides guides 14 and 15, thelatter being preferably shorter, as shown in the drawings, to permil;the work to be laterally removed, if desired. i

The precise construction, adjustments and mounting of these devices willnot be here- 1n set forth as these features in themselves form no partof the present invention, It may be noted, however, that the aboveapparatus is capable of receiving objects of round cross-section andautomatically moving them along between the grip of the wheels, rotat-.

with a resulting inaccuracy of grinding. In

grinding objects of this nature illustratively indicated b the pile ofrings 16, in accordance with t e preferred method of carrying on minvention, I follow the following proce ure:-

There is first fed along the work support and betwccn the wheels acylindrical part 17 of such length that it has no tendency to tilt.Following this are the objects to be ground, such as the rings 16, anumber of them being preferably placed end to end. These in turn arefollowed by a member 18 similar to the member 17 and, as indicated bythe rings 19, the work may be continuous, the elongated members beingalternated with the work.

Themembers 17 and 18 may be of such diameter that they will be groundand automaticall fed as they pass through the wheels, but in accordancewith the broader aspects of my invention they may be of some what lessdiameter so lon as they are of such size and shape that t ey prevent substantial tilting of the work. It may also be noted that, although Iprefer to precede and follow the work with these parts 17 and 18,nevertheless certain advantageous results may be attained with either ofthem used separately. For example, the part 17 provides an abutmentagainst which the work may rest and be fed and in and of itself is ofbeneficial action. Also, the use of a following member, such as the part18, properly manipulated to rest snugly against the rear end of the workis of itself highly beneficial. In this last action, that is, assuminthat the following member only be employe it should be so shaped as toprovide an end abutment against which the rear end of the work may restevenly when in its desired position and should be urged forward as therings feed through the machine so as to maintain this relation.

It will thus be seen that there is herein provided an art in which theseveral objects of the invention are achieved and which is well adaptedto meet the conditions of practical use. It will also be seen thatarticles of short length relative to their diameter may be rapidly,effectively and efliciently ground, and that the art provided by thisinvention may be carried on with great saving in time and hence withhigh speed of production.

As various changes might be made in the art herein described and as myinvention might becarried on with other apparatus, it is to beunderstood that all matter herein set forth or shown in the accompanyingdrawing is to be interpreted as illustrative and not in a limitingsense.

I claim as my invention:

1. The herein described art of grinding cylindrical work of short axiallength relative to its diameter, which consists in placing the work inposition for entrance axially into a passage therefor between a grindingwheel and a regulating wheel, the regulating wheel being adapted toengage the periphery of the work to rotate the work about its axis andto exert a feeding component tending to feed the work along saidpassage, the grinding wheel being adapted to grind the eri hery of thewcrk as it is thus rotated an fe p0- sitioning against an end surface ofsaid short work a surface adapted to support said short work againsttilt-ing out of its proper position forgrinding, and moving the workthus supported and accompanied by said supporting surface into saidpassage between the wheels.

2. The herein described art of grinding cylindrical work of short axiallength relative to its diameter, which consists in placing the work inposition for entrance axially into a passage therefor between a grindingwheel and a-regulating wheel, the regulating wheel being adapted to engae the periphery of the work to rotate the WOFk about its axis and tofeed the work along said passage, the grinding wheel being adapted togrind the periphery of the work as it is thus rotated and fed, placingloosely against the rear end surface of said work an elongatedsupporting member having no tendency to tilt and having its work-engaing surface at right angles to the longitu inal axis of the work, andurging the work thus supported axially into said passage betweenthewheels.

3. The herein described art of grinding cylindrical work of short axiallength rel- I ative toits diameter, which consists in placing the workin position for entrance axially into a passage therefor between agrinding wheel and a regulating wheel, the regulating wheel beingadapted to engage the periphery of the work to rotate the work about itsaxis and to feed the work along said passage, the grinding wheel beingadapted to grind the periphery of the work as it is thus rotated andfed, placing at the rear of said work thus positioned a member ofgreater axial length than its diameter and of a lesser diameter than thework, said member having a. forward face in a plane at right angles tothe axis of the work and loosely engaging the rear end surface of thework to support the work against tilting, and then urging said memberforwardly to push the work thus supported and followed thereby into andthrough said passage between the wheels.

4. The herein described art of grinding cylindrical work of short axiallength relative to its diameter, which consists in placing the work inposition for entrance axially into a passage therefor between a grindingwheel and a regulating wheel, the regulating wheel being adapted toengage the periphery of the work to rotate the work about its axis andto feed the work axially along saidpassage, the grinding wheel beingadapted to grind the periphery of the work as it is thus rotated andfed, and feeding said work into said passage between the wheelsaccompanied by a member having a surface in a plane at right angles tothe axis of the work and loosely engaging an end surface of the work tosupport the work against tilting and in its proper relation to thewheels for operation thereon by the wheels.

5. The herein described art of grinding which consists in feedingbetween grinding and regulating wheels a succession of groups ofarticles to be ground, each of which is of small length with respect toits diameter, and inter-posing between such groups in the line of feedmembers of substantially greater length with respect to their diameterto support said articles against tilting as they enter the throat of thegrinding and regulating wheels.

(3. The herein described art of grinding which consists in. feedingbetween grinding and regulating wheels of the peripheral type asuccession ofiarticles'to be ground of short length relative to theirdiameter'and preceding such articles by an elongated member providedwith a supporting surface against which the articles loosely rest and bywhich they are supported against tilting.

7. The herein described art of grinding which consists in feedingbetween grinding and regulating wheels a succession of articles of smalllength with respect to their diameter and pressing against thev rearmostarticle a member of substantially greater length with respect to itsdiameter and provided with a transverse end face fitting snugly' againstthe rear article with the latter in proper position for grinding therebyto support the articles against tilting out of said position.

-8. The herein described art of grinding which consists in' feedingbetween rinding and regulating wheelsa succession 0 articles of smalllength with respect to their diameter, pressing against theire'armostarticle a member; of 'substantiallygreater length with respect to itsdiameter and provided with a transverse end face fitting snugly againstthe rear article with the latter in proper po- I operative faces ofgrinding and .regulatin a 7;

wheels, said work being ground by sai rinding wheel and rotated by saidreguating wheel as it is ground, and holdlng against said work a member.of greater length than said work and having an end face resting snuglyagainst an end face of the work to support said short work againstsi'tionfor engagement by said wheels as said work is rotated and groundthereby."

In testimony whereof, I have signed my name to this specification thissixteenth day of -May, 1922.

. LEWIS R. I- IEIM.

65. I tilting and to hold'said work in proper po

